CVE-2026-41277

Summary

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, a Mass Assignment vulnerability in the DocumentStore creation endpoint allows authenticated users to control the primary key (id) and internal state fields of DocumentStore entities. Because the service uses repository.save() with a client-supplied primary key, the POST create endpoint behaves as an implicit UPSERT operation. This enables overwriting existing DocumentStore objects. In multi-workspace or multi-tenant deployments, this can lead to cross-workspace object takeover and broken object-level authorization (IDOR), allowing an attacker to reassign or modify DocumentStore objects belonging to other workspaces. This vulnerability is fixed in 3.1.0.

Affected Software

Weaknesses

• CWE-284: CWE-284: Improper Access Control
• CWE-639: CWE-639: Authorization Bypass Through User-Controlled Key
• CWE-915: CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: total

Additional References

• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-3prp-9gf7-4rxx

References

• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-3prp-9gf7-4rxx

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